mirror of
https://github.com/servo/servo.git
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#8539 Config preferences backend restructure
This commit is contained in:
Peter Hall
parent
34fda66dfa
commit
8bfd4dc1e2
53 changed files with 1748 additions and 680 deletions
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@ -7,251 +7,475 @@ use crate::opts;
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use embedder_traits::resources::{self, Resource};
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use serde_json::{self, Value};
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use std::borrow::ToOwned;
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use std::cmp::max;
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use std::collections::HashMap;
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use std::fs::File;
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use std::io::{stderr, Read, Write};
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use std::path::PathBuf;
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use std::sync::{Arc, RwLock};
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use crate::pref_util::Preferences;
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pub use crate::pref_util::{PrefError, PrefValue};
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use gen::Prefs;
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lazy_static! {
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pub static ref PREFS: Preferences = {
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let defaults = default_prefs();
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if let Ok(prefs) = read_prefs(&resources::read_string(Resource::Preferences)) {
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defaults.extend(prefs);
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}
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defaults
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static ref PREFS: Preferences<'static, Prefs> = {
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let def_prefs: Prefs = serde_json::from_str(&resources::read_string(Resource::Preferences))
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.expect("Failed to initialize config preferences.");
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Preferences::new(def_prefs, &gen::PREF_ACCESSORS)
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};
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}
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#[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
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pub enum PrefValue {
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Boolean(bool),
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String(String),
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Number(f64),
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Missing,
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/// A convenience macro for accessing a preference value using its static path.
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/// Passing an invalid path is a compile-time error.
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#[macro_export]
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macro_rules! pref {
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($($segment: ident).+) => {{
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let values = $crate::prefs::pref_map().values();
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let lock = values.read()
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.map(|prefs| prefs $(.$segment)+.clone());
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lock.unwrap()
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}};
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}
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impl PrefValue {
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pub fn from_json(data: Value) -> Result<PrefValue, ()> {
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let value = match data {
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Value::Bool(x) => PrefValue::Boolean(x),
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Value::String(x) => PrefValue::String(x),
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Value::Number(x) => {
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if let Some(v) = x.as_f64() {
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PrefValue::Number(v)
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} else {
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return Err(());
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}
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},
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_ => return Err(()),
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};
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Ok(value)
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}
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pub fn as_boolean(&self) -> Option<bool> {
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match *self {
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PrefValue::Boolean(value) => Some(value),
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_ => None,
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}
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}
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pub fn as_string(&self) -> Option<&str> {
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match *self {
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PrefValue::String(ref value) => Some(&value),
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_ => None,
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}
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}
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pub fn as_i64(&self) -> Option<i64> {
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match *self {
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PrefValue::Number(x) => Some(x as i64),
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_ => None,
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}
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}
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pub fn as_u64(&self) -> Option<u64> {
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match *self {
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PrefValue::Number(x) => Some(x as u64),
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_ => None,
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}
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}
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/// A convenience macro for updating a preference value using its static path.
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/// Passing an invalid path is a compile-time error.
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#[macro_export]
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macro_rules! set_pref {
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($($segment: ident).+, $value: expr) => {{
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let values = $crate::prefs::pref_map().values();
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let mut lock = values.write().unwrap();
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lock$ (.$segment)+ = $value;
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}};
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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pub enum Pref {
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NoDefault(Arc<PrefValue>),
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WithDefault(Arc<PrefValue>, Option<Arc<PrefValue>>),
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}
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impl Pref {
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pub fn new(value: PrefValue) -> Pref {
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Pref::NoDefault(Arc::new(value))
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}
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fn new_default(value: PrefValue) -> Pref {
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Pref::WithDefault(Arc::new(value), None)
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}
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fn from_json(data: Value) -> Result<Pref, ()> {
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let value = PrefValue::from_json(data)?;
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Ok(Pref::new_default(value))
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}
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pub fn value(&self) -> &Arc<PrefValue> {
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match *self {
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Pref::NoDefault(ref x) => x,
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Pref::WithDefault(ref default, ref override_value) => match *override_value {
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Some(ref x) => x,
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None => default,
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},
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}
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}
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fn set(&mut self, value: PrefValue) {
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// TODO - this should error if we try to override a pref of one type
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// with a value of a different type
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match *self {
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Pref::NoDefault(ref mut pref_value) => *pref_value = Arc::new(value),
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Pref::WithDefault(_, ref mut override_value) => *override_value = Some(Arc::new(value)),
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}
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}
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}
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pub fn default_prefs() -> Preferences {
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let prefs = Preferences(Arc::new(RwLock::new(HashMap::new())));
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prefs.set(
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"layout.threads",
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PrefValue::Number(max(num_cpus::get() * 3 / 4, 1) as f64),
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);
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prefs
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}
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pub fn read_prefs(txt: &str) -> Result<HashMap<String, Pref>, ()> {
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let json: Value = serde_json::from_str(txt).or_else(|e| {
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println!("Ignoring invalid JSON in preferences: {:?}.", e);
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Err(())
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})?;
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let mut prefs = HashMap::new();
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if let Value::Object(obj) = json {
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for (name, value) in obj.into_iter() {
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match Pref::from_json(value) {
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Ok(x) => {
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prefs.insert(name, x);
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},
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Err(_) => println!(
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"Ignoring non-boolean/string/i64 preference value for {:?}",
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name
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),
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}
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}
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}
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Ok(prefs)
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/// Access preferences using their `String` keys. Note that the key may be different from the
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/// static path because legacy keys contain hyphens, or because a preference name has been renamed.
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///
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/// When retrieving a preference, the value will always be a `PrefValue`. When setting a value, it
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/// may be a `PrefValue` or the type that converts into the correct underlying value; one of `bool`,
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/// `i64`, `f64` or `String`.
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#[inline]
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pub fn pref_map() -> &'static Preferences<'static, Prefs> {
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&PREFS
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}
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pub fn add_user_prefs() {
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match opts::get().config_dir {
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Some(ref config_path) => {
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let mut path = PathBuf::from(config_path);
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init_user_prefs(&mut path);
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},
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None => {
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if let Some(mut path) = default_config_dir() {
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if path.join("prefs.json").exists() {
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init_user_prefs(&mut path);
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}
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}
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},
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if let Some(path) = user_prefs_path() {
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init_user_prefs(path);
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}
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}
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fn init_user_prefs(path: &mut PathBuf) {
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path.push("prefs.json");
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if let Ok(mut file) = File::open(path) {
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fn user_prefs_path() -> Option<PathBuf> {
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opts::get()
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.config_dir
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.clone()
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.or_else(|| default_config_dir())
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.map(|path| path.join("prefs.json"))
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.filter(|path| path.exists())
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}
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fn init_user_prefs(path: PathBuf) {
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if let Ok(mut file) = File::open(&path) {
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let mut txt = String::new();
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file.read_to_string(&mut txt).expect("Can't read use prefs");
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if let Ok(prefs) = read_prefs(&txt) {
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PREFS.extend(prefs);
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file.read_to_string(&mut txt)
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.expect("Can't read user prefs");
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match read_prefs_map(&txt) {
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Ok(prefs) => {
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if let Err(error) = PREFS.set_all(prefs.into_iter()) {
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writeln!(&mut stderr(), "Error setting preference: {:?}", error)
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} else {
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Ok(())
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}
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},
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Err(error) => writeln!(&mut stderr(), "Error parsing prefs.json: {:?}", error),
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}
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} else {
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writeln!(
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&mut stderr(),
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"Error opening prefs.json from config directory"
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)
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.expect("failed printing to stderr");
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writeln!(&mut stderr(), "Error opening user prefs from {:?}", path)
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}
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.expect("failed printing to stderr");
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}
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pub struct Preferences(Arc<RwLock<HashMap<String, Pref>>>);
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pub fn read_prefs_map(txt: &str) -> Result<HashMap<String, PrefValue>, PrefError> {
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let prefs: HashMap<String, Value> =
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serde_json::from_str(txt).map_err(|e| PrefError::JsonParseErr(e))?;
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prefs
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.into_iter()
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.map(|(k, pref_value)| {
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Ok({
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let v = match &pref_value {
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Value::Bool(b) => PrefValue::Bool(*b),
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Value::Number(n) if n.is_i64() => PrefValue::Int(n.as_i64().unwrap()),
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Value::Number(n) if n.is_f64() => PrefValue::Float(n.as_f64().unwrap()),
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Value::String(s) => PrefValue::Str(s.to_owned()),
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_ => {
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return Err(PrefError::InvalidValue(format!(
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"Invalid value: {}",
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pref_value
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)));
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},
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};
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(k.to_owned(), v)
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})
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})
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.collect()
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}
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impl Preferences {
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pub fn get(&self, name: &str) -> Arc<PrefValue> {
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self.0
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.read()
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.unwrap()
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.get(name)
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.map_or(Arc::new(PrefValue::Missing), |x| x.value().clone())
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mod gen {
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use servo_config_plugins::build_structs;
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// The number of layout threads is calculated if it is not present in `prefs.json`.
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fn default_layout_threads() -> i64 {
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std::cmp::max(num_cpus::get() * 3 / 4, 1) as i64
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}
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pub fn cloned(&self) -> HashMap<String, Pref> {
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self.0.read().unwrap().clone()
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fn black() -> i64 {
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0x000000
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}
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pub fn set(&self, name: &str, value: PrefValue) {
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let mut prefs = self.0.write().unwrap();
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if let Some(pref) = prefs.get_mut(name) {
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pref.set(value);
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return;
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}
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prefs.insert(name.to_owned(), Pref::new(value));
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fn white() -> i64 {
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0xFFFFFF
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}
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pub fn reset(&self, name: &str) -> Arc<PrefValue> {
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let mut prefs = self.0.write().unwrap();
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let result = match prefs.get_mut(name) {
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None => return Arc::new(PrefValue::Missing),
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Some(&mut Pref::NoDefault(_)) => Arc::new(PrefValue::Missing),
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Some(&mut Pref::WithDefault(ref default, ref mut set_value)) => {
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*set_value = None;
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default.clone()
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build_structs! {
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// type of the accessors
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accessor_type = crate::pref_util::Accessor::<Prefs, crate::pref_util::PrefValue>,
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// name of the constant, which will hold a HashMap of preference accessors
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gen_accessors = PREF_ACCESSORS,
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// tree of structs to generate
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gen_types = Prefs {
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browser: {
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display: {
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#[serde(default = "white")]
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background_color: i64,
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#[serde(default = "black")]
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foreground_color: i64,
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}
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},
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css: {
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animations: {
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testing: {
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#[serde(default)]
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enabled: bool,
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},
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},
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},
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dom: {
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bluetooth: {
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enabled: bool,
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testing: {
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enabled: bool,
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}
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},
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canvas_text: {
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#[serde(rename = "dom.canvas-text.enabled")]
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enabled: bool,
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},
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composition_event: {
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#[serde(rename = "dom.compositionevent.enabled")]
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enabled: bool,
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},
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custom_elements: {
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#[serde(rename = "dom.customelements.enabled")]
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enabled: bool,
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},
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document: {
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dblclick_timeout: i64,
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dblclick_dist: i64,
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},
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forcetouch: {
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enabled: bool,
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},
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fullscreen: {
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test: bool,
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},
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gamepad: {
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enabled: bool,
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},
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microdata: {
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testing: {
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enabled: bool,
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}
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},
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mouse_event: {
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which: {
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#[serde(rename = "dom.mouseevent.which.enabled")]
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enabled: bool,
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}
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},
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mutation_observer: {
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enabled: bool,
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},
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offscreen_canvas: {
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enabled: bool,
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},
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permissions: {
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enabled: bool,
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testing: {
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allowed_in_nonsecure_contexts: bool,
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}
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},
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serviceworker: {
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enabled: bool,
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timeout_seconds: i64,
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},
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servoparser: {
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async_html_tokenizer: {
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enabled: bool,
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}
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},
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svg: {
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enabled: bool,
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},
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testable_crash: {
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enabled: bool,
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},
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testbinding: {
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enabled: bool,
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prefcontrolled: {
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#[serde(default)]
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enabled: bool,
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},
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prefcontrolled2: {
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#[serde(default)]
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enabled: bool,
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},
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preference_value: {
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#[serde(default)]
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falsy: bool,
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#[serde(default)]
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quote_string_test: String,
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#[serde(default)]
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space_string_test: String,
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#[serde(default)]
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string_empty: String,
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#[serde(default)]
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string_test: String,
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#[serde(default)]
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truthy: bool,
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},
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},
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testing: {
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element: {
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activation: {
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#[serde(default)]
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enabled: bool,
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}
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},
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html_input_element: {
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select_files: {
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#[serde(rename = "dom.testing.htmlinputelement.select_files.enabled")]
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enabled: bool,
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}
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},
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},
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testperf: {
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#[serde(default)]
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enabled: bool,
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},
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webgl: {
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dom_to_texture: {
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enabled: bool,
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}
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},
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webgl2: {
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enabled: bool,
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},
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webrtc: {
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#[serde(default)]
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enabled: bool,
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},
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webvr: {
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enabled: bool,
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event_polling_interval: i64,
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test: bool,
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},
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webxr: {
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#[serde(default)]
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enabled: bool,
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},
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worklet: {
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blockingsleep: {
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#[serde(default)]
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enabled: bool,
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},
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#[serde(default)]
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enabled: bool,
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testing: {
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#[serde(default)]
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enabled: bool,
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},
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timeout_ms: i64,
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},
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},
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gfx: {
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subpixel_text_antialiasing: {
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#[serde(rename = "gfx.subpixel-text-antialiasing.enabled")]
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enabled: bool,
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}
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},
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js: {
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asmjs: {
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enabled: bool,
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},
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asyncstack: {
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enabled: bool,
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},
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baseline: {
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enabled: bool,
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unsafe_eager_compilation: {
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enabled: bool,
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},
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},
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discard_system_source: {
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enabled: bool,
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},
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dump_stack_on_debuggee_would_run: {
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enabled: bool,
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},
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ion: {
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enabled: bool,
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offthread_compilation: {
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enabled: bool,
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},
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unsafe_eager_compilation: {
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enabled: bool,
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},
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},
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mem: {
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gc: {
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allocation_threshold_mb: i64,
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allocation_threshold_factor: i64,
|
||||
allocation_threshold_avoid_interrupt_factor: i64,
|
||||
compacting: {
|
||||
enabled: bool,
|
||||
},
|
||||
decommit_threshold_mb: i64,
|
||||
dynamic_heap_growth: {
|
||||
enabled: bool,
|
||||
},
|
||||
dynamic_mark_slice: {
|
||||
enabled: bool,
|
||||
},
|
||||
empty_chunk_count_max: i64,
|
||||
empty_chunk_count_min: i64,
|
||||
high_frequency_heap_growth_max: i64,
|
||||
high_frequency_heap_growth_min: i64,
|
||||
high_frequency_high_limit_mb: i64,
|
||||
high_frequency_low_limit_mb: i64,
|
||||
high_frequency_time_limit_ms: i64,
|
||||
incremental: {
|
||||
enabled: bool,
|
||||
slice_ms: i64,
|
||||
},
|
||||
low_frequency_heap_growth: i64,
|
||||
per_compartment: {
|
||||
enabled: bool,
|
||||
},
|
||||
per_zone: {
|
||||
enabled: bool,
|
||||
},
|
||||
zeal: {
|
||||
frequency: i64,
|
||||
level: i64,
|
||||
},
|
||||
},
|
||||
high_water_mark: i64,
|
||||
max: i64,
|
||||
},
|
||||
native_regex: {
|
||||
enabled: bool,
|
||||
},
|
||||
offthread_compilation: {
|
||||
enabled: bool,
|
||||
},
|
||||
parallel_parsing: {
|
||||
enabled: bool,
|
||||
},
|
||||
shared_memory: {
|
||||
enabled: bool,
|
||||
},
|
||||
strict: {
|
||||
debug: {
|
||||
enabled: bool,
|
||||
},
|
||||
enabled: bool,
|
||||
},
|
||||
throw_on_asmjs_validation_failure: {
|
||||
enabled: bool,
|
||||
},
|
||||
throw_on_debuggee_would_run: {
|
||||
enabled: bool,
|
||||
},
|
||||
timers: {
|
||||
minimum_duration: i64,
|
||||
},
|
||||
wasm: {
|
||||
baseline: {
|
||||
enabled: bool,
|
||||
},
|
||||
enabled: bool,
|
||||
ion: {
|
||||
enabled: bool,
|
||||
}
|
||||
},
|
||||
werror: {
|
||||
enabled: bool,
|
||||
},
|
||||
},
|
||||
layout: {
|
||||
animations: {
|
||||
test: {
|
||||
enabled: bool,
|
||||
}
|
||||
},
|
||||
columns: {
|
||||
enabled: bool,
|
||||
},
|
||||
#[serde(default = "default_layout_threads")]
|
||||
threads: i64,
|
||||
viewport: {
|
||||
enabled: bool,
|
||||
},
|
||||
writing_mode: {
|
||||
#[serde(rename = "layout.writing-mode.enabled")]
|
||||
enabled: bool,
|
||||
}
|
||||
},
|
||||
media: {
|
||||
testing: {
|
||||
enabled: bool,
|
||||
}
|
||||
},
|
||||
network: {
|
||||
http_cache: {
|
||||
#[serde(rename = "network.http-cache.disabled")]
|
||||
disabled: bool,
|
||||
},
|
||||
mime: {
|
||||
sniff: bool,
|
||||
}
|
||||
},
|
||||
session_history: {
|
||||
#[serde(rename = "session-history.max-length")]
|
||||
max_length: i64,
|
||||
},
|
||||
shell: {
|
||||
homepage: String,
|
||||
keep_screen_on: {
|
||||
enabled: bool,
|
||||
},
|
||||
#[serde(rename = "shell.native-orientation")]
|
||||
native_orientation: String,
|
||||
native_titlebar: {
|
||||
#[serde(rename = "shell.native-titlebar.enabled")]
|
||||
enabled: bool,
|
||||
},
|
||||
searchpage: String,
|
||||
},
|
||||
webgl: {
|
||||
testing: {
|
||||
context_creation_error: bool,
|
||||
}
|
||||
},
|
||||
};
|
||||
if *result == PrefValue::Missing {
|
||||
prefs.remove(name);
|
||||
}
|
||||
result
|
||||
}
|
||||
|
||||
pub fn reset_all(&self) {
|
||||
let names = {
|
||||
self.0
|
||||
.read()
|
||||
.unwrap()
|
||||
.keys()
|
||||
.cloned()
|
||||
.collect::<Vec<String>>()
|
||||
};
|
||||
for name in names.iter() {
|
||||
self.reset(name);
|
||||
}
|
||||
}
|
||||
|
||||
pub fn extend(&self, extension: HashMap<String, Pref>) {
|
||||
self.0.write().unwrap().extend(extension);
|
||||
}
|
||||
|
||||
pub fn is_webvr_enabled(&self) -> bool {
|
||||
self.get("dom.webvr.enabled").as_boolean().unwrap_or(false)
|
||||
}
|
||||
|
||||
pub fn is_dom_to_texture_enabled(&self) -> bool {
|
||||
self.get("dom.webgl.dom_to_texture.enabled")
|
||||
.as_boolean()
|
||||
.unwrap_or(false)
|
||||
}
|
||||
|
||||
pub fn is_webgl2_enabled(&self) -> bool {
|
||||
self.get("dom.webgl2.enabled").as_boolean().unwrap_or(false)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue